— I can’t get through to the general manager’s office.—The line is busy. Someone ________ the telephone.
#76155
A
must have used
B
could use
C
could have used
D
must be using
推荐题目
-----Can I watch TV, Mom? -----No, you . You to do your homework first.
#76494
A
don’t; have
B
can’t; can’t
C
can’t; have
D
do; must
— What does the sign over there say?— No person ______ enter the area without the official permission.
#63455
A
shall
B
may
C
must
D
will
He is ______ outstanding student from ______ university in America.
#77185
A
a; a
B
a; an
C
an; a
D
an; an
---- May I smoke here?--- If you , choose a seat in the smoking section.
#62982
A
should
B
could
C
must
D
may
You _______ to tell him the news. It will make him sad.
#76924
A
needn’t
B
shouldn’t
C
couldn’t
D
don’t need